New Castle County, Delaware & Surrounding Areas

Built Right.From Square One.

Owner-operated construction and remodeling you can count on. Jim Brown and the Square One team bring craftsmanship, transparency, and real accountability to every project — residential or commercial.

Completed custom built-in library and cabinetry by Square One Construction
15+
Years in Business
300+
Projects Completed
100%
Owner on Every Job
Full-Scope
Construction Services
From ground-up builds to finishing touches, we handle it all in-house with an experienced crew and no subcontractor runaround.
01
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Residential Remodeling
Kitchen and bath renovations, basement finishing, additions, and whole-home remodels that stay on budget and on schedule.
Most Popular
02
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New Construction
Custom homes and light commercial builds from foundation to finish. We coordinate every trade so you don't have to.
Ground-Up
03
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Windows & Doors
Energy-efficient window replacements, entry doors, patio doors, and storm doors — properly installed for a lasting seal.
Energy Savings
04
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Custom Built-Ins & Cabinetry
Wall-to-wall built-in shelving, library walls, entertainment centers, home office setups, and custom cabinetry — designed and built on-site to fit your space perfectly.
Signature Work
05
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Decks & Outdoor Spaces
Pressure-treated and composite deck builds, pergolas, and covered patios designed to complement your home and lifestyle.
Outdoor Living
06
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General Contracting
Need a trusted GC to coordinate your project? We manage timelines, subcontractors, permits, and inspections start to finish.
Project Management
More Recent Projects
Local jobs, local pride. Every project completed by the Square One crew right here in New Castle County and surrounding communities.
Custom built-in cabinetry project in progress
Custom Built-Ins
Library Wall & Home Office — Shaker Built-Ins
New Castle County, DE  ·  2024
🏡
Full Kitchen Remodel
Elkton Road — Complete Kitchen Renovation
Newark, DE  ·  2024
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New Construction
Custom Home Build
Bear, DE  ·  2023
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Deck & Patio
Composite Deck + Pergola
Wilmington, DE  ·  2024
L-shaped base cabinets with granite countertop
Custom Cabinetry
L-Shaped Base Cabinet Run & Granite Tops
New Castle County, DE  ·  2024
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Basement Finish
Basement & Rec Room Build-Out
Hockessin, DE  ·  2024
Jim Brown on-site documenting a custom built-in project
A+
BBB
Rated
Jim Brown,
Owner & Builder

Square One Construction was built on a simple principle: do the job right the first time. As an owner-operator, Jim Brown is on-site for every project — not just at the beginning, but throughout. That means your questions get answered directly, your timeline is respected, and the work meets a standard Jim would accept on his own home.

We serve homeowners and small business owners across New Castle County and the surrounding Delaware and Maryland communities. Licensed, insured, and backed by over 15 years of local construction experience — specializing in remodels, custom built-ins, new construction, and the kind of detail work that separates good from great.

Licensed & Fully Insured
Detailed Written Estimates
Owner Present on Every Job
Permit & Inspection Handling
No Surprise Change Orders
Local DE References Available
Schedule a Consultation
What Homeowners Are Saying
★★★★★
"
Jim and his crew completely transformed our kitchen. They were on time, communicated every step of the way, and the finished product is better than we imagined. We'll be calling Square One for our bathroom next.
Sarah & Tom M.
Newark, DE — Kitchen Remodel
★★★★★
"
We had three contractors bid our deck project. Jim was the only one who showed up on time, gave us a written estimate the same day, and could explain exactly what was included. Quality speaks for itself.
Mike R.
Bear, DE — Deck & Pergola
★★★★★
"
Hired Square One for custom built-in bookshelves and a home office setup. The craftsmanship is outstanding — every shelf is level, every door closes perfectly. Jim was reachable anytime we had a question. Highly recommend.
Linda H.
Wilmington, DE — Custom Built-Ins
From First Call
to Final Walkthrough
No runaround, no mystery. Here's exactly what working with Square One looks like.
01
Free Consultation
Call or fill out the form. Jim will visit your home, listen to your goals, and walk the space with you.
02
Detailed Estimate
You'll get a written estimate with clear scope, materials, timeline, and cost — no vague allowances.
03
Build Phase
Jim and the crew execute with daily progress, clean work areas, and direct communication throughout.
04
Final Walkthrough
We walk every detail with you. Punch list items are handled on the spot. You don't pay final until you're satisfied.
Let's Talk
About Your Project

Ready to get started or just exploring your options? Reach out for a free, no-pressure consultation. Jim will get back to you personally within one business day.

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Phone
✉️
Email
📍
Service Area
New Castle County, DE
Cecil County, MD & Surrounding Areas
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Office Hours
Mon–Fri: 7:00 AM – 6:00 PM
Sat: By Appointment
Call Jim Directly
Request a Free Estimate
We'll follow up within one business day.
Proudly Serving
Bear Newark Wilmington Middletown Hockessin Pike Creek New Castle Claymont Elkton, MD Cecil County, MD
📞 Call Jim Get a Quote